SFDC custom fields listed as "unmapped" in Marketo

[Anonymous]

There are a few custom fields created in Salesforce that are listed as "Unmapped Custom Fields" in Marketo Field Management. The fields show up in Marketo, but there is no data. How can I get this mapped? Is it something I can do or does it need to be done by Marketo support? 

[Josh_Hill13]

mapped to what? Most of those fields are marketo only or just not mapped to another field in SFDC. This is not necessarily a problem.

Ask your SFDC Admin and then contact Support if you need to map these back to something.

[Anonymous]

They're not Marketo only - I'm talking about Salesforce fields w/ data that show up in Marketo w/ no data. I need the data to be viewable in Marketo. I thought the fact that they're "unmapped" was the reason the SF data did not show up in Marketo. 

[Josh_Hill13]

I would speak with your SFDC Admin to review the data schema and then call Support.